Earth-boring tool.



Nd. 878,856. IATENTED FEB. 11, 1908. A. BELDIMAN.

EARTH BORING TOOL.

, APPLICATION FILED DIE-0.13, 190s.

5 a; 4 If ALEXANDER BELDIMAN, OF BERLIN, GERMANY.

EARTH-BORING TOOL.

iSpe cifieation of Letters Patent.

Application filed December 16' 1906- Serialll'o. 347.673.

To all whom it may concern."

-Be it known that I, ALEXANDER BELDr- MAN, a subject of the King of Roumania, and

resident of Berlin, Germany, have invented certain new and useful Improvements in Earth-Boring Tools for Deep Boring with a Jumping Chisel, of which the following is a chisel to the cutting edge of the chisel, where it is ejected in the formof one or several jets,

for washing purposes, and in conducting the. water to the motor in such a manner, that the cross-section of the bore-hole isnot narrowed by other rods. The reversing ofthe device; for conducting the .water under pressure to.

the motor through the piston is effected automatically.

According to the embodiment of the invention disclosed in the present specification,

the chisel is. moved up'and down by hydraulic power and the water in the shank of the chisel made to do motorial work.

Figures 1 and 2 show such a boring-device in a longitudinal section, Fig. 2 being the continuation of Fig. 1. Figs. 3 to 5 are cross-sections of Fig. 1 on the lines 3 3 and 44 and 5-5. Fig. 6 is a cross section on line 6-6, Fig. 1.

Similar numerals refer to similar parts throughout the several views.

'All the'parts of the"boring-apparatus are arranged in a joint or common cast iron body 11, preferably composed of several parts. The upper end of the same is provided with a cylindrical cavity 12 and connected with the lower endsof the rod 13in a manner that the latter can be axially shifted in the cast iron body. This axial shifting is limited by a projection 14 moving in the cylindrical cavity 12, and which is covered at the top by a plate 15 fastened to the cast body. This device is to be called in the following simply fish-join j j The piston '16'of. themotor is'arranged in the lowerpart of'the cast body and connected at the top with the hollow iston. rod v17, and ollow chisel 18. Thewater is admitted from the hollow rod 13 to the Workingchambers 19 and. 2Ct=of the motor through avlateral channel: 21-provided in the cast body, with which is connected on one side a chamber 22, and on the other an annular channel 23.-- I (See Fig. 5..).;.- The upper side of the piston 16 is providedzwith two tubes 24 and 25- concentrically. surrounding the piston-rods; the first stube is connected, at its lower end with the chamber 20 of-the cylinder, and projectswitheits upper end into the chamber 26, provided in the cast body, while the tube 25 communicates at its lower end through openings 27,!!Wlllh upper end with the annu ar'charnber 28 arranged in the cast bodynBothchambers, 26 and 28, areconneoted through channels therefore allow the water topasslfrom the channel 21 to "the working chambersaof the motor. From the cast bodytherefnrther 29, 30 on the other, is arranged-traversing device 33 in the form of a slide in the constructionshown in the drawing Thenpper end of the latter is ointed to a-doubleearrned lever 35, oscillating on the=bolt,,34 which is a bar 36, on which slides a bush39between twosprings 37, 38. Upon bush 39, are carried two collars 40 whose positionsthereon may be adjusted by means of setscrews 40. Also on the bush 39 slides .a second: and shorter bushel and this, in its turn, is j ointpivots 4:1 carried by bush 41, and slots 35 m lever '35. If therefore the piston-rod moves out of the position shown in Fig-. 1 in a downward direction, the slide 33 remains two-armed lever 35 is turned to thearight and thereby the slide 33 shifted higher up, so that through its shell 42 it connects the channel 29, and consequently the chamber 26, with; the annular channel 23. position of the slide thewatercanenter throu h. thechamber 26, and the tube 24, into t e lower chamber 20 0f theicylinder, and raise the piston of the motor. The wasteewater can at the same time pass out of the upper chamber 19 of the cylinder through the holes 27,. tube '25, chamber 28 and channels 30 and32. If the piston of the Patented Feb. 11 1908. p

thechamber 19 of the c linden, andaat its.

lead two-openings 31, 32, and-between these. openings on the one side, and thechannels carried by the cast iron body 11. The hol-. low piston-rod 17 carries, at itsupper end,

29, 30 with ,thewannular channel 23:,i.and

ed to the two-armed lever 35 by means of in its state of rest, until the upper projection .40 strikes against the bush 411*. Now the In this motor has returned into its up er position, the lower projection 40 effects t e reversing of the slide 33, so that the latter returns into the position shown in Fig. 1, and the water can now pass out of the annular channel 23 into the chamber 28, and through the tube 25 into'the space 19 of the cylinder, while the waste-water escapes out of the chamber of the cylinder through the tube24. The springs 37 and 38 only have the urpose to reduce the shock caused by t 1e projections 40.

In order to make the reversing-devices, whose form of construction is not an essen tial feature of this invention, easily accessible, the cast body may be provided with a removable lid 11 At the place where the hollow piston-rod- Apasses throu h the chamber 22, it is provided with ho cs 44, through which the water can, if desired, enter directly into the shank entering into thev hollow of the chisel without having done work in the motor, from which shank it passes to one or several of the squirting holes 45'arranged near the cutting edge of the chisel. Out of thesesquirting holes the water passes with its full pressure into theimmediat'e vicinity of the bottom of the borehole and washes the same, in conse uence of which the deepboring is facilitate If the water 'enteringinto the hollow piston-rod is also to do motorial work, this can be efiecte'd by fastening to a cross-piece 46 (see Fig. 1) fixed in the cast body a pis' ton 47 projecting into'the piston-rod, which offers an abutmentt'o the water.. Thewater uently attempts to push t ef latter fromthe ed piston 47, for the squirt-hole 45 a great deal smaller than the cross-section of the piston 47, so that the water entering thehollow :pistonrod-works motorially, and reinforces the action of the water entering the chamber 19 of the cylinder. In thiswa the cross-section of the deep-boring is ut' ized, as far as possible, for motorial work.

'If it should occur that the descending chisel meets, in a hard rock, with a resistance which it cannot overcome with one single stroke, the piston of the motor could not finish its stroke, and the reversing-device would consequently not be reversed, that is to say the deep boring device would beset out of action. 'In order to avoid this, the above mentionedfish-j ointhas been provided, for if the chisel cannot go downwards, the whole device will, with the exception of the chisel, be raised, and be shifted 1i wards towards the fixed hollow bars 13, sot at, in this way, the motor will be sure to be reversed. A

What I claim as my invention and desire to secure by United'States Letters Patent i s 1. An earth boring tool comprising a body provided with a channel for water under iston-rod conse.-.

pressure, a motor in said body having com munication with the channel, a chisel driven by the motor and provided with squirt holes,

and a hollow rod connecting the aforesaid channel with the squirt holesin the chisel.

2. An earth boring tool comprising a body provided with a. channel, a reciprocating piston arranged in said'body and having its opposite faces ada ted-to receive from the c annel water un er pressure, a self actin reversing device for the piston, and a chise provided with squirt holes having communication with the channel. a

3'. An earth boring tool comprising a body provided with a channel, a reciprocating piston arranged in said body, driven by water received from the channel, {and provided with a hollow piston rod communicating at communicating with the other end of the piston rod and provided with squirt holes.

4. An earth oring tool comprisinga body one end with the channel, anda hollow chisel provided with a channel and two chambers 1 in communication with said channel, a reciprocatory piston working in the body and provided with a piston rod, two tubes surrounding the. piston 'rod, each of which opens at one end into one of the chambers in thebody and at its other end to opposite-sides of the piston.

5. An earth boring tool comprising a body provided with a channel, two chambers 1ncommunication with the channel, and two outlet channels for the chambers, a motor in the body having communication with the two chambers, and a reversing device placring the chambers alternately into and out of '115 7. An earth boring tool comprising a body provided with a channel, a reciprocating piston driven by water received from said 'channel, arranged in said body and having a hollow piston rod opening to said channel, and a piston working in one end of said piston rod and fastened to the body to act as a motor. i

8. An earth boring tool comprising a body provided with a channel, a motor driven by fluid received from said channel, a hollow reciprocatory chisel driven by said motor and provided with squirt holes and having communication with the channel, and a piston adapted to act on the water within the hollow chisel to assist in driving the chisel iii one The foregeing s eeification signed at Ber.

direction. h h n b lin this 23rd ieyo November,'1906.

9'fThe combination Wit t e ho ow ore v i rod, of an earth borinfi tool a, motor carried ALEXANDER BELDIMAN' 5 thereby, and a joint etween the bore rod In presence 0fand the tool, permitting the earth boring WOLDEMAR HAUP'T, tool to move relatively to the bore rod. v HENRY HASPER.- 

